solution.rs

fn v(n: u32) -> u32 {
    return match n {
        n if n > 0 => 3*c(n-1),
        _ => 1,
    }
}

fn c(n: u32) -> u32 {
    return match n {
        n if n > 0 => 2*v(n-1) + 2*c(n-1),
        _ => 1,
    }
}

fn main() {
    println!("{}", 2*v(9));
}